This is the Ninja EFRA 2042 polished inline tuned pipe. This is the one piece variety and requires an off-road manifold, which attaches to the tuned pipe using three small springs and a manifold gasket (included). This pipe is designed for all around performance, specifically with the Ninja JX21 B02 engine.
This is the tuned pipe come with a manifold which must be purchased separately.

This is the Ninja JX21-B02 .21 Off Road Competition Racing Engine. Improving on the championship winning Ninja line of engines was a difficult task, but the combined experience and technology at Mugen Seiki Racing and O.S. Engines has created the ultimate power plant for any 1/8 scale buggy or truck.